I know how you feel. There are no off the shelf bodykits for the FC3S around. Mostly of the time they are from half cuts. You can always ask a shop to custom a body kit for the FC. They could use a Mazda 6 or 3 as a base, The newer body kits for those cars look good
eg; Ken style Mazda3
http://www.japan-car-tuning.ch/catalog/product_info.php?manufacturers_id=13&products_id=763&language=en&osCsid=8fba4ac4b6f4f449dc1c68d3e16871ca